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- W3101696543 abstract "We investigate the effect of diagonal disorder on bosons in an optical lattice described by an Anderson-Hubbard model at zero temperature. It is known that within Gutzwiller mean-field theory spatially resolved calculations suffer particularly from finite system sizes in the disordered case, while arithmetic averaging of the order parameter cannot describe the Bose glass phase for finite hopping J>0. Here we present and apply a new stochastic mean-field theory which captures localization due to disorder, includes non-trivial dimensional effects beyond the mean-field scaling level and is applicable in the thermodynamic limit. In contrast to fermionic systems, we find the existence of a critical hopping strength, above which the system remains superfluid for arbitrarily strong disorder." @default.
- W3101696543 created "2020-11-23" @default.
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- W3101696543 date "2009-06-01" @default.
- W3101696543 modified "2023-09-23" @default.
- W3101696543 title "Stochastic mean-field theory for the disordered Bose-Hubbard model" @default.
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- W3101696543 doi "https://doi.org/10.1209/0295-5075/86/50007" @default.
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